JP5989468B2 - Sheet shutter - Google Patents

Description

  The present invention relates to a sheet shutter suitably provided for a partition inside a building, an entrance / exit thereof, and the like.

As a conventional technique, for example, a sheet shutter provided at an entrance of a factory or a warehouse is known.
This seat shutter is provided with side rails standing on both the left and right sides of the doorway, a curtain-like seat that is guided by the side edges of the side rails to open and close the side rails, and is provided on the upper part of the seat. A take-up drum that raises and lowers the sheet according to an opening / closing operation and a drive motor for rotating the take-up drum are provided.

  A box-shaped casing is provided at the upper part of the doorway, and the winding drum and the sheet wound around the winding drum are stored in the casing. Further, an opening for feeding the sheet is formed on the lower surface of the casing, and the sheet is sent out through the opening.

  By the way, since many sheet shutters can block the inflow of air by a curtain-like sheet, the sheet shutter has higher airtightness than a shutter made of a steel plate in which a plurality of steel plates are simply connected. For this reason, sheet shutters are often used in places where space tightness is required, such as dustproof, soundproof, and deodorant.

Further, regarding this point, as a sheet shutter that further improves the airtightness, for example, there is a conventional technique disclosed in Patent Document 1 (see FIG. 15).
In this sheet shutter, the winding drum 103 is offset from the center line to the wall surface side of the building with respect to the opening portion 102 for feeding out the sheet 101, and the back surface of the sheet 101 is set to the edge of the opening portion 102 on the building wall surface 106 side. 102a is always in contact.

  That is, as shown in FIG. 15, the back surface of the sheet 101 is brought into contact with a so-called lintel 102, and the air flows from the front surface side of the sheet 101 to the back surface side of the sheet 101 through the inside of the casing 104 (arrow A in FIG. 15). ) Is blocked by contact between the lintel 102 and the sheet 101. Therefore, the interior and the exterior are separated from each other by the sheet 101, and the airtightness is increased.

Japanese Patent Application Laid-Open No. 11-076443

  By the way, according to the sheet shutter having the above structure, although the air flow is blocked by the contact between the sheet 101 and the lintel 102, for example, when the lower end 101a of the sheet 101 reaches the floor 105 and the sheet 101 is loosened, the sheet 101 Will rise from the lintel 102. That is, sufficient airtightness has not been ensured at the time of full closure where the most airtightness is required.

  In addition, many sheet shutters are lighter than steel sheet shutters, so they are opened and closed at high speed. In this regard, in the above-described sheet shutter, the sheet 101 is constantly rubbed against the lintel 102, so that the contact portion becomes a resistance and the sheet is randomly wound, and the sheet is worn, frayed, and dirty. It becomes a factor of. That is, although the conventional sheet shutter is excellent in airtightness, many points to be improved still remain.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sheet shutter that does not hinder the opening and closing of the sheet and that provides high airtightness when fully closed.

In order to solve the above problems, the sheet shutter of the present invention is
Guide rails provided on both right and left sides, a seat provided between the guide rails so as to be movable up and down, a winding shaft provided above the seat and raising and lowering the seat according to opening and closing of the seat, and the seat A partition for forming an opening for feeding and partitioning a front and back space of the sheet across the sheet in the opening;
When the shutter is fully closed, the sheet is bent and abuts against an inner surface of the opening.

In the present invention configured as described above, the front and back spaces of the sheet are partitioned with the sheet passing through the opening. In addition, when the shutter is fully closed, the sheet is bent and abuts against the inner surface of the opening, so that a gap formed between the sheet and the opening is closed by the bent sheet.
That is, during the opening / closing operation, a load is applied to the seat, and the seat moves up and down in a stretched state. For this reason, rubbing between the sheet and the inner surface of the opening is avoided. Further, when the sheet is fully closed and the sheet is bent while the lower end of the sheet is in contact with the floor, the gap is closed by the bending. Thus, high airtightness is obtained when fully closed.

  Further, with the rotation of the take-up shaft, the separation point may be a position where the sheet is separated from the take-up shaft, and the peel point may be offset so as to avoid the center line of the guide rail.

  In this configuration, the seat is fed out avoiding the center line of the guide rail, so when the lower end of the seat reaches the floor and the load is received by the floor, the upper part of the seat is away from the center line of the guide rail by its own weight. Naturally bends. That is, the sheet is easily bent by feeding out the sheet while avoiding the center line of the guide rail.

  Further, the seat is connected without being wound around the winding shaft, and the stop position of the connecting portion when the shutter is fully closed is set to a position higher than the upper end of the guide rail. Good.

That is, in this configuration, when the shutter is fully closed, the connecting portion of the sheet is exposed on the surface of the winding shaft, and the connecting portion moves in the circumferential direction of the winding shaft as the winding shaft rotates, When the shutter is fully closed, it stops at a position higher than the upper end of the guide rail.
When the stop position is set in this way, the sheet is prevented from being caught on the upper end of the guide rail, and the sheet is loosened. Therefore, the sheet is easily bent from the connection portion to the upper end portion of the guide rail.

  In the seat, the stop position of the connecting portion when the seat is fully closed may be set so as to avoid a position directly above the inner surface of the opening.

  In this configuration, since the connecting portion stops while avoiding the position directly above the inner side surface of the opening, the sheet bends along the inner side surface of the opening. Therefore, the contact state is kept good.

Further, an engaging member for slidably connecting the seat to the guide rail is provided on a side edge of the seat,
The guide rail for guiding the engaging member into the guide rail may be swingably provided on the guide rail.

In this configuration, the engagement member is provided on the side edge of the seat, and the seat is supported between the guide rails by the engagement between the engagement member and the guide rail. Further, a guide is provided on the upper portion of the guide rail, and the engaging member is guided and engaged in the guide rail by this guide.
In addition, the side edge of the seat is supported not only by the guide rail but also by a guide provided on the upper portion thereof, but the guide is provided so as to be swingable, so that the guide follows the bending of the seat. The sheet can be supported without reducing the bending of the sheet in the inclination and sheet width direction.

  As described above, according to the present invention, it is possible to provide a sheet shutter that does not hinder the opening and closing of the sheet and that provides high airtightness when fully closed.

It is a perspective view of the sheet shutter concerning this embodiment. It is a figure which shows the internal structure around a rail post and a winding shaft. It is a figure which shows the internal structure of the center vicinity of a sheet shutter. It is a figure which shows the inclination direction of a guide. It is a figure which shows the connection state of the sheet | seat with respect to a winding shaft. It is a schematic diagram which shows the positional relationship of a peeling point and a guide rail. It is a schematic diagram which shows the positional relationship of the connection part of a sheet | seat with respect to a winding shaft, and a guide rail. It is a schematic diagram which shows the positional relationship of the connection part of a sheet | seat, and an opening inner surface. It is a figure which shows the example of a change of the sheet shutter shown to this Embodiment. It is a figure which shows the example of a change of the sheet shutter shown to this Embodiment. It is a figure which shows the state which taped the sheet | seat to the winding shaft. It is a figure which shows the other connection state of the sheet | seat main body with respect to a winding shaft. It is a figure which shows the other connection state of the sheet | seat main body with respect to a winding shaft. It is a figure which shows the other connection state of the sheet | seat main body with respect to a winding shaft. It is a figure which shows the conventional sheet shutter.

Hereinafter, the example which installed the sheet shutter of this invention in the entrance and exit of the building is demonstrated.
As shown in FIG. 1, the seat shutter 1 shown in the present embodiment includes a pair of rail posts 20, 20 erected on both the left and right sides of the doorway, and guide rails 21 incorporated in the rail posts 20, 20; The sheet 30 is supported between the guide rails 21 and 21 so as to freely move up and down, and a winding device 40 that raises and lowers the sheet 30 in accordance with an opening / closing operation of the sheet 30 is provided.

  The rail post 20 is made of a light steel plate or the like having a U-shaped cross section, and is fixed to both side walls of the doorway using screws or the like. Further, in each rail post 20, 20, a guide rail 21 for guiding the seat 30 along the rail post 20 is fixed to the facing surface. As shown in FIG. 2, a guide 25 for guiding and engaging the side edge of the seat 30 into the guide rail 21 is provided between the guide rail 21 and the winding shaft 41 at the upper portion of the guide rail 21. Built-in swingable.

The sheet 30 includes a sheet main body 31 (FIG. 5 and the like) cut according to the entrance and exit, a weight 39 (FIG. 1) provided at the lower end of the sheet main body 31, and the sheet main body 31 suspended from the winding device 40. And a flap 32 (FIG. 5 and the like) for lowering and fixing.
The sheet body 31 is made of a flexible material selected in accordance with various specifications such as dust prevention, deodorization, soundproofing and heat insulation. Further, a flap 32 is connected to the upper edge portion, and a plurality of engaging members 33 (FIGS. 1 and 4) for slidably connecting the seat body 31 to the guide rail 21 are provided on both side edges. ing.

  As shown in FIG. 5, the flap 32 is composed of two flap sheets 32a and 32b whose inner surfaces are anti-slip processed. Further, the flap 32 is formed by joining one flap sheet 32a and the other flap sheet 32b with a slight shift near each lower end, and further welding and joining the overlapping portions. . Further, the upper edge of the sheet body 31 is welded to the lower end of the flap 32. That is, the sheet main body 31 is provided so as to be suspended from the lower end of the flap 32 composed of the two flap sheets 32a and 32b.

  Then, one flap sheet 32a and the other flap sheet 32b are wound from opposite directions with respect to the take-up shaft 41 of the take-up device 40, respectively, and a hook-and-loop fastener 32c is provided on the overlapping portion to provide a flap. The sheets 32a and 32b are fixed to each other. Therefore, the winding shaft 41 is fastened by the flap 32, and the sheet body 31 is connected to the winding shaft 41 without being displaced.

Subsequently, as shown in FIG. 1, the engaging member 33 is provided continuously to the left and right side edges of the seat 30.
The engaging member 33 is engaged with the guide rail 21 described above, and the seat body 31 is moved up and down of the guide rail 21 without detaching the guide rail 21 due to the engagement between the engaging member 33 and the guide rail 21. Guided in the direction.

  The guide rail 21 is formed of an elastically deformable resin material, and a guide groove 21a is formed in the longitudinal direction (see FIG. 2). Normally, the engaging member 33 is engaged with the guide groove 21a. However, when an excessive external force is applied to the seat body 31, the engaging member 33 is detached from the guide groove 21a and the engagement state is released. It has become. That is, the seat body 31 and the guide rail 21 are prevented from being damaged by releasing the engaged state.

  Further, the engaging member 33 that has come out of the guide groove 21a passes through the guide 25 provided at the upper part of the guide rail 21 when the seat body 31 is wound, so that it returns into the guide groove 21a. It has become. That is, like the wire fastener, the engaging member 33 detached from the guide groove 21 a is realigned on the extension line of the guide rail 21 when passing through the guide 25. Further, when the sheet main body 31 continues to be advanced, the realigned engaging member 33 enters the guide groove 21a, and the engaged state is ensured again.

Next, the winding device 40 will be described.
The winding device 40 includes a winding shaft 41 extending in the sheet width direction, and a motor 42 provided at a position close to the rail post 20 and connected to the winding shaft 41 via a reduction gear. In the present embodiment, the winding shaft 41 is composed of a plurality of pipes 41a, and the winding shaft 41 is configured by arranging these pipes 41a in a circular shape.

  In the winding device 40 shown in the present embodiment, the connection portion 30a (FIG. 7 and the like) of the sheet 30 is exposed on the surface of the winding shaft 41 when the shutter is fully closed.

  Although not shown, the winding device 40 is connected to auxiliary devices such as a limit switch for defining the rotation angle of the winding shaft 41 and a switch for controlling the rotation direction of the winding shaft 41. ing. The connecting portion 30a of the seat 30 rotates in the circumferential direction along with the rotation of the winding shaft 41 accompanying the opening / closing operation, and stops at a desired stop position defined by the limit switch.

  Further, the winding device 40 having these configurations is housed in a hollow box-shaped casing 45 installed on the upper wall surface P of the doorway serving as an installation location. In addition, an opening 45a for feeding the sheet 30 is formed in the bottom plate of the casing 45 in accordance with a shutter opening / closing operation.

The opening 45a is formed parallel to the winding shaft 41 and along the wall of the building. Further, the front ends of the rail posts 20 come into contact with both ends thereof, and the seat 30 suspended from the opening 45 a descends along the rail posts 20.
Moreover, the horizontal member 50 is provided in the opening part 45a so that the edge 45b of the near side may be followed. The horizontal member 50 is addressed from the lower side of the casing 45 and forms a so-called “lintel” from the edge 45 b of the opening to the lower side thereof.
The internal space of the casing 45 is partitioned into a front-side space and a back-side space of the sheet 30 with a sheet 30 suspended through the opening 45a.

  Hereinafter, the inner surface of the horizontal member 50 facing the opening 45a may be referred to as an inner surface 50a of the lintel. Further, in relation to the means for solving the problem, the bottom plate of the casing 45 corresponds to the partition wall. An inner side surface 50a formed from the edge 45b of the opening 45 to the lower end of the lintel 50 corresponds to the inner side surface of the opening.

When the sheet shutter 1 is opened and closed, the stop position of the winding shaft 41 is determined as follows.
For example, it can be configured to grasp that the winding shaft 41 or the motor 42 is fully closed based on the rotation amount of the winding shaft 41 or the motor 42. That is, the pulse encoder is connected to the winding shaft 41 and the rotation shaft of the motor 42, and the number of pulses from the fully open to the fully closed state of the seat 30 is previously grasped. When the seat 30 is closed, the number of pulses generated by the pulse encoder is counted, and when the number of pulses corresponding to full closing is detected, it is determined that the valve is fully closed, and the closing operation is stopped. In this case, the number of pulses is obtained by adding the number of pulses corresponding to the amount of rotation necessary from when the lower end of the sheet 30 is grounded or landing to when the sheet 30 is further bent and contacts the inner side surface 50a of the opening. It is. Therefore, the control in this case is simply a determination of whether or not the number of pulses has reached a value corresponding to full closure, and there is no need to perform additional control relating to the amount of deflection, so the control is simple. Become.

  The above-described control is not limited to the pulse encoder, and can be arbitrarily selected as long as it can grasp the amount of rotation of the winding shaft and the motor 42, for example, by measuring the amount of rotation angle. Furthermore, the same control can be performed by measuring the amount of movement of the sheet.

Next, the airtight structure of the sheet shutter 1 having the above structure will be described.
The sheet shutter 1 shown in the present embodiment obtains high airtightness by utilizing the bending of the sheet 30 when the shutter is fully closed.
Specifically, the sheet 30 is brought into contact with the inner surface 50a of the lintel 50 facing the opening 45a in a bent state, and the air flowing from the sheet surface side through the inside of the casing 45 to the sheet back surface side Prevent inflow. That is, the gap formed between the sheet 30 and the lintel 50 is configured to be closed by utilizing the bending of the sheet 30 that occurs when the shutter is fully closed.

  Further, as a configuration in which the sheet 30 is positively bent toward the lintel 50 side, in the present embodiment, the offset amount of the winding shaft 41 with respect to the guide rail 21 and the stop of the sheet 30 connected to the winding shaft 41 are stopped. The position and the like are appropriately set in consideration of the material of the sheet.

FIG. 6 is a schematic diagram showing the positional relationship between the peeling point 34 of the sheet 30 and the guide rail 21. FIG. 7 is a schematic diagram showing the positional relationship between the stop position of the seat connection portion 30a and the upper end portion of the guide rail 21. As shown in FIG. FIG. 8 is a schematic diagram showing the positional relationship between the stop position of the seat connecting portion 30a and the lintel inner side surface 50a.
Further, in the present embodiment, the guide 25 is provided on the upper portion of the guide rail 21, but the guide 25 is provided so as to be swingable so as to move following the bending or warping of the seat 30. The details are omitted in this schematic diagram.

First, the offset of the winding shaft 41 will be described with reference to FIG.
As shown in FIG. 6, the axis of the take-up shaft 41 is arranged at a predetermined distance from the guide rail 21, that is, is offset. In the present invention, the side shifted from the guide rail 21 is referred to as the front side of the shutter for convenience.
Further, as shown in FIG. 6, the end of the winding shaft 41 opposite to the shutter front side with respect to the axis of the winding shaft 41 is also offset to the shutter front side with respect to the guide rail 21. (In the direction of arrow C in FIG. 6). In the present invention, the winding shaft 41 in this state may be expressed as being offset with respect to the guide rail 21 in the present invention.
In the winding shaft 41, the end of the winding shaft 41 opposite to the shutter front side with respect to the axis of the winding shaft 41 is offset to the shutter front side from the lintel inner surface side 50a.

Further, the offset amount is set such that the surface of the sheet 30 does not rub against the inner surface 50a of the lintel during the opening / closing operation of the shutter. That is, as the feeding amount of the sheet 30 increases, the separation point 34 is displaced toward the axis of the take-up shaft 41. Therefore, the offset amount is determined in consideration of the movement of the separation point 34.
It should be noted that the separation point 34 needs to be off from the center line of the guide rail 21 in the vicinity of the shutter fully closed, preferably just before the shutter is fully closed, and the position of the separation point 34 in the fully opened state and the initial to middle period is not particularly limited.

Next, the stop position of the sheet 30 connected to the winding shaft 41 and the installation height of the winding shaft 41 will be described with reference to FIG.
In the present embodiment, the installation height H of the winding shaft 41 is determined so that the connection portion 30a of the seat 30 is located at a position higher than the upper end of the guide rail 21.

  In the present embodiment, the take-up shaft 41 is positioned on the front side of the shutter with respect to the guide rail 21, and the stop position of the seat connection portion 30a corresponding to the fully closed state takes into account the dimensional tolerance of the seat 30. The forward direction (arrow A direction in FIG. 7) is set within a range of 1/4 to 1/2 rotation.

  When the winding shaft 41 rotates in the closing direction of the sheet 30, centrifugal force acts on the sheet 30, and the sheet 30 is separated from the winding shaft (in FIG. 6, in the direction away from the lintel inner surface side 50a). ) Prone to move. As shown in FIG. 4, the sheet 30 is free except that both ends in the width direction are restrained by the guide rails 21. Therefore, other than both ends of the sheet 30 in the width direction, particularly in the vicinity of the center in the width direction, the sheet 30 tends to move more remarkably in the direction away from the lintel inner surface side 50a. However, when the shutter 30 is fully closed, the connection portion 30a of the sheet 30 is exposed on the surface of the winding shaft 41 (particularly, the connection portion 30a is positioned in the range of 1/4 to 1/2 rotation in the forward direction). When the shutter is fully closed, it is possible to control the movement of the sheet 30 in the direction away from the lintel inner surface side 50a against the centrifugal force acting on the sheet 30. It becomes easy to contact the lintel inner surface side 50a.

By the way, in the configuration in which the connecting portion 30a of the sheet 30 is not exposed on the surface of the winding shaft 41 even when the shutter is fully closed, the suppression effect by the connecting portion 30a cannot be expected. In this case, a pressing member (not shown) that can resist the centrifugal force acting on the sheet 30 or more positively moves the sheet 30 in the direction of the lintel inner surface 50a. It may be provided. A pressing member may be further provided when the connecting portion 30a of the sheet 30 is exposed on the surface of the winding shaft 41 when the shutter is fully closed.
Alternatively, it is advantageous from the viewpoint of simplification of the configuration and cost reduction to omit the pressing member and use only the connection portion 30a (and the guide rail).

  In addition to the guide rail 21, the guide 25 is provided on the upper portion thereof, so that the lower end surface of the winding shaft 41 is provided so as not to overlap the guide 25 when viewed from the front side of the shutter. That is, the installation height of the take-up shaft 41 with respect to the guide rail 21 and the guide 25 is determined so that it can be stopped at any one of 1/4 to 1/2 rotations in the forward direction.

  Next, the relationship between the inner surface 50a of the lintel 50 and the connecting portion 30a of the seat 30 will be described with reference to FIG. In this relationship, when the shutter is fully closed, the take-up shaft 41 is offset to the front side of the shutter so that the stop position of the sheet connecting portion 30a is just above the inner surface 50a of the lintel 50 (arrow in FIG. 8). B direction).

  As described above, in this embodiment, when determining the offset amount of the winding shaft 41, the positional relationship among the guide rail 21, the peeling point 34, the connecting portion 30a of the sheet, the inner surface 50a of the lintel, and the like is determined. The offset amount is determined in consideration of the above.

Next, how the sheet 30 is bent based on the above configuration will be described.
As shown in FIG. 6, the peeling point 34 of the sheet 30 is offset to the front side of the shutter with respect to the center line of the guide rail 21. For this reason, when the lower end of the sheet 30 reaches the floor and the load of the sheet is received, the section begins to bend toward the lintel 50 side from the peeling point 34 to the upper part of the guide rail 21.

  Further, as shown in FIG. 7, when the stop position of the seat connection portion 30a is set higher than the guide rail 21, the seat 30 is not caught on the upper end of the guide rail 21, and the tension of the seat 30 is suppressed. Therefore, the sheet 30 follows the lintel 50 while being bent downward by its weight.

  Further, as shown in FIG. 8, if the stop position is set slightly forward while avoiding directly above the inner side surface of the lintel 50, the sheet 30 is abutted against the inner surface 50 a side of the lintel 50 and contacted therewith. The state is kept good.

  Further, as shown in FIG. 4, since the guide 25 follows the bending of the sheet 30 and tilts toward the inner surface 50 a side of the lintel 50 (in the direction of arrow B in FIG. 4), the sheet 30 is bent by the guide 25. Without being restrained, it abuts against the lintel 50 widely in the sheet width direction.

As described above, in the present embodiment, the take-up shaft 41 is offset with respect to the guide rail 21, and the stop position of the seat 30 connected to the take-up shaft 41 is appropriately set, so that the sheet 30 is desired. Is positively bent in the direction of, ensuring airtightness when the shutter is fully closed.
Further, since the gap is closed by utilizing the bending of the sheet 30 when the shutter is fully closed, the sheet 30 and the lintel 50 are not touched during the opening / closing operation, and the opening / closing is not hindered.

  Further, regarding the method of fixing the sheet 30 to the winding shaft 41, in this embodiment, the winding shaft 41 is fastened by two flap sheets 32a and 32b, and the sheet 30 is fixed to the winding shaft 41. This structure has little slippage of the flap 32 with respect to the take-up shaft 41 and can cope with high-speed lowering. Further, since the seat 30 can be attached and detached simply by removing the hook-and-loop fastener 32c, the replacement of the seat and the maintenance of the apparatus are easy. Further, in the present sheet shutter, since the stop position of the sheet connecting portion 30a with respect to the take-up shaft 41 is important, the present structure which is difficult to slide and can be easily attached and detached is advantageous.

The present embodiment is merely an embodiment, and can be changed according to various specifications such as how the sheet 30 is bent and the structure of the sheet 30.
For example, as shown in FIG. 9, a rear lintel 52 may be provided on the back surface side of the sheet 30, and the sheet 30 may be bent and brought into contact with an inner side surface 52 a of the rear lintel 52.

Further, as shown in FIG. 10, the connecting portion 30 a of the seat 30 is stopped on the building side from the inner surface 50 a of the lintel 50, and the seat 30 is bent toward the lintel 50 side using the stiffness of the seat 30. You can also.
Thus, various ways of bending the sheet 30 can be exemplified. Further, the stop position of the sheet connecting portion 30a and the offset of the take-up shaft 41 can be changed in accordance with the strength of the sheet and the way of bending.

  Further, regarding the method of joining the flap sheets 32a and 32b, for example, as shown in FIG. 11, if the lower flap sheet 32a is taped to the take-up shaft 41 in advance at the overlapping portion, the take-up is performed. Positioning and detaching of the seat 30 with respect to the shaft 41 are further facilitated. That is, the front end of the flap sheet 32a and the winding shaft 41 are stopped by the tape 32d.

  Furthermore, the flap sheets 32a and 32b and the sheet body 31 may be made of the same material. However, considering the cost and the like, the sheet body 31 is made of an expensive material with high functionality, and the flap sheets 32a and 32b are used. It is recommended to use a thin and inexpensive material. Further, different materials may be used for the flap sheets 32a and 32b in consideration of the load.

  Regarding the fixing of the sheet 30 and the take-up shaft 41, the two flap sheets 32a and 32b are used in the above embodiment. For example, as shown in FIGS. 12 and 13, only one flap sheet is used. It is also possible to fix the sheet to the take-up shaft using.

  In the example shown in FIG. 12, the flap sheet 35 is prepared slightly longer than the circumference of the winding shaft 41, and the upper edge portion 31 a of the sheet body 31 is directly welded near the center of the flap sheet 35. Connect. Further, surface fasteners are provided at both end portions 35a and 35b of the flap sheet 35, and the flap sheet 35 is wound around the winding shaft 41 so that the end portions 35a and 35b overlap each other.

In the example shown in FIG. 13, the flap sheet 36 is prepared slightly longer than the circumferential length of the winding shaft 41, and the end portions 36a and 36b are slightly shifted from each other and butt-welded. Further, by joining the end portions in this way, the flap sheet 36 becomes a cylindrical shape having an inner diameter substantially equal to the outer diameter of the winding shaft 41. Moreover, the upper edge part 31a of the sheet | seat main body 31 is connected to the site | part where edge parts are joined using a hook-and-loop fastener. Then, the flap sheet 36 provided with the sheet body 31 is inserted into the take-up shaft 41 and attached. Further, as a rotation stop of the flap sheet 36 with respect to the winding shaft 41, a screw 36 c is driven from the surface side of the flap sheet 36 toward the winding shaft 41, and the flap sheet 36 is fixed to the winding shaft 41.
In this way, the sheet body 31 can be connected to the winding shaft 41 with only one flap sheet.

  Further, as shown in FIG. 14, the sheet body 31 may be connected to the winding shaft 41 without using a flap. In this case, the take-up shaft 41 is constituted by a single member, and a sheet holding groove 37 is formed from one side end to the other side end. In addition, a rod-shaped sheet holding member 38 that is inserted into the groove 37 so as not to drop off is prepared. Here, the groove 37 for holding the sheet has a circular cross section, and a part of the arc is partially opened on the surface of the winding shaft 41. The rod-shaped sheet holding member 38 has a circular cross section, and can be inserted into the sheet holding groove 37 from one side. Further, the sheet main body 31 is fixed to the rod-shaped sheet holding member 38 at the upper edge portion 31a, and when the sheet holding member 38 is inserted into the groove 37, the sheet main body 31 is a groove facing the surface of the take-up shaft 41. It can be suspended through the gap 37. In this way, the sheet body 31 can be connected to the take-up shaft 41 without using a flap. Alternatively, the sheet body 31 may be directly fixed to the take-up shaft 41 using a sheet, tape, screw, adhesive, or the like.

DESCRIPTION OF SYMBOLS 1 Sheet shutter 20 Rail post 21 Guide rail 21a Guide groove 25 Guide 30 Sheet 30a Sheet connection part 31 Sheet main body 31a Upper edge part 32 of sheet main body Flap 32a, 32b Flap sheet 32c Surface fastener 32d Tape 33 Engaging member 34 Peeling Point 39 Weight 35 Flap sheet 35a, 35b Flap sheet end 36 Flap sheet 36a, 36b Flap sheet end 36c Screw 37 Sheet holding groove 38 Sheet holding member 40 Winding device 41 Winding shaft 41a Pipe 42 Motor 45 Casing 45a Opening 45b Opening edge 50 Horizontal material (lintel)
50a Inner side surface 52 of the rear lintel 52a Inner side surface of the rear lintel 101 Sheet 101a Lower end of the sheet 102 Opening portion 102a Edge of the opening 103 Winding drum 104 Casing 105 Floor 106 Wall surface P of the building Upper wall surface

Claims (5)

Guide rails provided on both right and left sides, a seat provided so as to be movable up and down between the guide rails, a winding shaft provided above the seat and moving the seat up and down according to opening and closing of the seat, and the seat A sheet shutter having an opening for feeding and partitioning a front and back space of the sheet across the sheet in the opening,
A sheet shutter, wherein the sheet is bent and abuts against an inner surface of the opening when the shutter is fully closed. With the rotation of the winding shaft, the separation point is the position where the sheet is separated from the winding shaft,
The sheet shutter according to claim 1, wherein the separation point is offset so as to avoid the center line of the guide rail.   When the shutter is fully closed, the sheet is connected to the take-up shaft so that a connection portion of the sheet is exposed on the surface of the take-up shaft, and the stop position of the connection portion is from the upper end of the guide rail. The sheet shutter according to claim 1, wherein the sheet shutter is set at a higher position.   When the shutter is fully closed, the sheet is connected to the take-up shaft such that a connection portion of the sheet is exposed on the surface of the take-up shaft, and the stop position of the connection portion is on the inner surface of the opening. The sheet shutter according to any one of claims 1 to 3, wherein the sheet shutter is set so as not to be directly above. An engaging member for slidably connecting the seat to the guide rail is provided at a side edge of the seat,
The sheet shutter according to any one of claims 1 to 4, wherein a guide for introducing the engaging member into the guide rail is swingably provided at an upper portion of the guide rail. .

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